Charloute wrote an exam which had 25 questions. Each question she answers correctly gets her 20 marks. However, she loses 10 marks for each question she answers incorrectly. She attempted all the questions and got a total of 290 marks. How many questions did she answer wrong?

Along a highway, there are electric poles on one side of the highway and telegraph poles on the other side. The electric poles are separated by 16 m and the telegraph poles are separated by 40 m. If an electric and a telegraph pole are both present at the point where the highway begins, after how much distance along the highway will they both be in front of each other again?

The parking lot of the Fairground has a capacity of 1175 cars. On Thursdays the ratio of occupied spots to empty spots in the parking lot was 12:13. The number of additional cars that could park there is

Richard travels a total of 22.2 kilometers. He walks 3600 meters and takes a bus for the rest of the distance. What is the ratio of the distance traveled by walking to the distance covered by the bus?

Sokha's income is 30% less than Khemara's income, Viphop's income is 20% less than Sokha's income, and Charloute's income is 30% less than Sokha's income. Khemara gave 40% of his income to Viphop and 60% of his income to Charloute, Viphop's new income would be what fraction of Charloute's new income?

Charlie transfers oranges from a large box to few smaller boxes. Oranges from the larger box filled 3 smaller boxes and yet 8 oranges remained outside. If the number of oranges in each small box is n, then how many oranges were there in the larger box?